10. We (stand) on the corner when we (see) the accident. I1. While I (walk) to the market this morning I (meet) my next-door neighbour. 12. The lights (go) out last night while they (have) a party....

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Extracted text: 10. We (stand) on the corner when we (see) the accident. I1. While I (walk) to the market this morning I (meet) my next-door neighbour. 12. The lights (go) out last night while they (have) a party. 13. When we (be) on holiday we not (swim) because it was so cold. 14. She (play) the piano when the door-bell (ring). 15. The teacher (read) to us when a pupil suddenly (ask) a question.